Skimming tool



Oct. 13, 1931. R. .1. AND-ERoN SKIMMING TOOL Filed Aug. 15, 1930 lPatented Oct. 13,1931

*UNITED STATES PATENT oFFlcE 4RUSSELL J'. AN DERSON,l OF RACINE,WISCONSIN, ASSIGNOR T0 BELLE CITY MALLEABL-E IRON COMPANY, OF RACINE,WISCONSIN, A CORPORATION OF WISCONSIN .Y SKIMMING TOOL Application le'dAugust 15, 1930. Serial No. 475,481.

The present invention is in a skimming tool for use in skimming off orremoving slag and surface impurities from a bath of molten metal. Thelife or period of usefulness of skimmers is short because of the highheat to which they are subjected in use, resulting in oxidation of thetool and eventual destruction thereof. This necessitates frequentexpensive replacement. v

More particularly then, the invention relates to an improved skimmerwhich will not burn out and become destroyed.

The primary object of the invention is to provide an improved skimmingtool having vmeans to cause circulation therethrough of a cooling liquidwhen the same is in use, whereby such liquid acts as a heat transferagent to protect the skimmer. j

Another object is generally to improve skimmers of the kind mentioned.

Briefly these desirable objects are achieved in this embodiment of theinvention by the provision of a skimming tool comprising a hollowskimmer headand a hollow shaft con- 5 nected thereto, said shaft in turncarrying a handle. Arranged within the shaft is a conduit for leading acooling liquid into the` head for circulation therethrough, the "heatedliquid then by-passing around the inlet conduit through the shaft to bedischarged. atI any appropriate point. So much will at this time sufficeto give a general view of the improved structure. i

In the accompanying sheet of drawings illustrating a practicableembodiment of the invention:

Figure` 1 'is a general plan View pf the skimmer;

Figure 2 is a side elevational view thereof;

Figure 3 is an end view of the head; and,.

Figure 4 is a cross sectional view through .the shaft as seen along thesection line 4.-4 appearing in Figure 1, as` viewed in the directionofthe arrows.

The skimmer shown embodies a hollow shaft 10 preferably in the form of avpipe which at one end has welded thereto a handle 11. The other end ofthe shaft 10 is in communication with a rectangular or box shaped,closed skimmer head 12, the shaft being preflto leave a circulatorypassageway 14 which communicates with the interior of the head 12. Thatpart of the conduit 13 near the head is best supported and maintained ineoy proper position by supports 15 of a kind l which will least obstructthe passageway 14. It is important to observe that the conduit 13 hasits discharge end extended a'substan'- tial distance into the head 12. Acontrol valve 16 is associated with the conduit 13. as shown in Figure2. An outlet 'lead 17 is also provided in communication with thepassageway 14. l

In use the conduit 13 is connected to a cooling liquid source underpressure. A The' tool is next located in the melting furnace l with'thesame ready to skimV slag from theV The valve 16 surface of the meltedmetal.

has been opened and the cooling liquid then v I passes into the head andbecause 'of the extensionl of said conduit into the head 12 the liquidis caused to wash the walls of the head yin a most thorough manner, theliquid passing to opposite ends of the head, as shown by j the arrows inFigure 2, and thence into the passageway 14 to be carried oif by theoutlet lead 17 in an obvious manner. Thus the liquid quickly transfersthe heat to cool the skimmer in an effective manner to protect the sameagainst burning out.

From this detailed descriptionI it is nown apparent that an improvedskimmer results which achieves the objects heretofore recited and thatthe same is simple and cheap to produce with no likelihood that the samewill 'get out of order.

It is the intention to cover all such changes and modifications of theform of the invention herein disclosed which do not in material respectsdepart from the invention as expressed within the scope of the followingclaims.

What I claim is: v

n 1. In a skimmer, a closed hollow skimmer head, a hollow shaftconnected thereto and in communication `therewith, a conduit arrangedaxially within the shaft in a manner to provide a passageway between itand the shaft, said conduit communicating with the interior of the head,and an outlet from the passageway into' said head.

2. In a skimmer, a closed hollow skimmer head, a hollow shaft connectedthereto and in communication therewith, a conduit arranged axiallywithin the shaft in a manner to provide a passageway between it and theshaft. said conduit communicating with the interior of the head andextending a distance into said head, and an outlet from the passagewayinto said head.

3. In a skimmer, an elongated closed-hollow skimmer head, a hollow shaftsecured to the head midway between its ends, said shaft communicatingwith the interior of the head. vand an inlet' conduit into said headarranged inside and axially of the shaft in a. manner to provide anoutlet passageway from the head between the shaft and conduit.

4. In a skimmer, an elongated closed hollow skimmer head, a hollow shaftsecured to the head midway between its ends, said shaft communicatingwith the interior of the head, and an inlet conduit arranged inside andaxially of the shaft in a manner to provide an outlet passageway fromthe head between the shaft and conduit, said conduit extendingasubstantial distance into the head.

5. A skimmer comprising a hollow rectangular head, a shaft comprising apipe connected to the head intermediately of its ends and communicatingwith the interior of the head, a second and smaller pipe inside theIirst pipe, said smaller pipe also communieating with the head interiorand extending part way into said head, said inner pipe serv ing as acooling liquid inlet and a space between the two pipes serving` as anoutlet. RUSSELL J. ANDERSON.

